The DE-097 Speed Sensor is a small DIN Rail Mounted unit intended for standby alternators, generators, and Pumps. It is housed in DIN Rail Mount case with a painted metal cover plate. Terminal connections are made via a plugable 16-way terminal block. The DE-097 provides monitoring of four different engine speeds. Typically these are: Zero Rpm, Starter Cut Out (SCO), Under Speed (US), and Over Speed (OS).

The DE-097 has an LCD Display for indicating the Current Engine RPM, Starter Cut Out, Under Speed, and Overspeed settings. The following settings can be adjusted using the Keypad:

Zero Rpm

SCO Rpm

US Rpm

OS Rpm

Number Of Teeth on the Flywheel

Over Speed Latch (ON or OFF)

NOTE: These settings will not be lost in the event of Power Loss.Relays are ENERGISED when the Engine RPM is above the respective set speed, and DE-ENERGISED otherwise. When Over Speed Latch is set to “ON”, power must be removed from the unit in order to reset the Over Speed relay. The Zero Rpm setting is used to detect when the engine has stopped – this setting is adjustable and not set to 0 due to irregularity of the Input Signal at Low Engine RPM.